I build small things to see what happens. This time the thing I built decides what I should build next.
The idea
Every day, thousands of people leave one-star reviews on Google Play apps because something changed and it made their life worse: a price went up, an update broke a feature they relied on, a beloved app got abandoned. Buried in that noise is a signal — a group of users who want something specific enough that a solo developer could build it in a few weeks and have a real shot at winning them over.
appy.fyi goes looking for that signal on purpose.
How it works
Every morning it crawls a slice of the Play Store, pulls fresh reviews and rating history, and looks for apps with a visible crack: a rating that's been sliding, a burst of complaints pointing at the same thing. When it finds one, an LLM reads the reviews and turns them into a report — what changed, the verbatim complaints that prove it, how that app compares to its closest competitor, and a rough estimate of how long a rebuild would take and what it might earn. Each report ends with a verdict: build it, or skip it, and the one fact that made the call.
New reports land on the feed every day.
What's next
I didn't build appy.fyi to build apps for me — I built it to stop guessing. Instead of staring at a blank page trying to invent an idea, I can scroll a feed of ideas that are already backed by real, angry (or hopeful) users and just pick one.
Whether that turns out to be a shortcut or a trap, I don't know yet. That's the experiment.
Will it work? Take a look and tell me what you think →